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Finding the Fourth Proportional to 324,639.20, 486,627.60 and 219,468.80

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Solution

The fourth proportional to 324,639.20, 486,627.60 and 219,468.80 is: 328,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,639.20 : 486,627.60 = 219,468.80 : x
  2. Step 2: Convert to fraction form
    324,639.20/486,627.60 = 219,468.80/x
  3. Step 3: Cross multiply
    324,639.20x = 486,627.60 × 219,468.80
  4. Step 4: Simplify right side
    324,639.20x = 106,799,575,418.88
  5. Step 5: Solve for x
    x = 106,799,575,418.88/324,639.20
  6. Step 6: Final answer
    x = 328,979.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.